Hylaeamys perenensis (Allen, 1901)

Velazco, Paúl M. & Patterson, Bruce D., 2019, Small Mammals Of The Mayo River Basin In Northern Peru, With The Description Of A New Species Of Sturnira (Chiroptera: Phyllostomidae), Bulletin of the American Museum of Natural History 2019 (429), pp. 1-69 : 47-48

Hylaeamys perenensis (Allen, 1901)

VOUCHER MATERIAL: El Diamante: 2 adult females ( FMNH 203474 ; MUSM 39258 ), 2 juvenile females ( FMNH 203478 ; MUSM 39262 ), 6 adult males ( FMNH 203472 , 203480 , 203658 ; MUSM 39259 , 39260 , 39261 ), 1 juvenile male ( FMNH 203476 ) ; Tingana: 10 adult females ( FMNH 203484 , 203488 , 203662 , 203664 ; MUSM 39256 , 39264 , 39271 , 39272 , 39274 , 39276 ), 1 juvenile female ( FMNH 203482 ), 13 adult males ( FMNH 203486 , 203490 , 203492 , 203494 , 203668 ; MUSM 39263 , 39266–39270 , 39273 , 39277 ), 7 juvenile males ( FMNH 203496 , 203660 , 203666 , 203670 ,

203678; MUSM 39265 , 39275 ); Waqanki: 1 juvenile male ( FMNH 203470 ) ; see table 22 for measurements.

IDENTIFICATION: We consulted descriptions and measurements of Hylaeamys perenensis provided by Patton et al. (2000, as Oryzomys perenensis ), Weksler et al. (2006), Weksler and Percequillo (2011), Hice and Velazco (2012), Percequillo (2015b), and Brito and Pardiñas (2017a). No subspecies are currently recognized in H. perenensis ( Percequillo, 2015b; Brito and Pardiñas, 2017a). H. perenensis is distinguished from other species in the genus by the following combination of characteristics: medium size (head and body length 81–169 mm; tail 94–154 mm); tail shorter than head and body length; hind feet with medium-sized hypothenar pads; skull large and robust; incisive foramina long, narrow, teardrop shaped (length 3.6–6.0 mm; width 1.5–2.9 mm); roof of mesopterygoid fossa completely ossified; and M2 without a mesofossette and with long paraflexus ( Percequillo, 2015b; Brito and Pardiñas, 2017a). Our specimens conform to previous descriptions of the species, and their measurements fall within the range of size variation previously documented.

REMARKS: In the Mayo River basin, Hylaeamys perenensis was commonly captured in cultivated areas and flooded forests; it was less commonly captured in a coffee plantation and near a small stream. One pregnant female was recorded at the Tingana location. Lareschi and Velazco (2013) reported the mite Gigantolaelaps oudemansi type I from our specimens.